U.S. patent number 9,764,725 [Application Number 14/885,618] was granted by the patent office on 2017-09-19 for device for operating a brake system of a motor vehicle, and rotary position sensor.
This patent grant is currently assigned to ROBERT BOSCH GMBH. The grantee listed for this patent is Robert Bosch GmbH. Invention is credited to Bernd Lutz, Matthias Mayr, Juergen Tandler, Andreas Weh.
United States Patent |
9,764,725 |
Lutz , et al. |
September 19, 2017 |
Device for operating a brake system of a motor vehicle, and rotary
position sensor
Abstract
A device is provided for operating a brake system of a motor
vehicle having an electric motor, which is configured for driving a
pressure generation unit in order to generate hydraulic pressure; a
housing block of a hydraulic unit, which is able to be connected to
the pressure generation unit and the brake system of the motor
vehicle; a control unit for controlling the electric motor; and a
rotary position sensor of the electric motor, the electric motor
being fixed in place on a first side of the housing block of the
hydraulic unit, and the control unit being fixed in place on a
second side, situated opposite from the first side, of the housing
block of the hydraulic unit, and the rotary position sensor of the
electric motor being situated in such a way that it detects a
rotational frequency and/or an angular position of a rotor of the
electric motor and is connected to the control unit by an opening
developed in the housing block of the hydraulic unit. Also provided
is a method for operating a brake system of a motor vehicle, and to
a rotary position sensor.
Inventors: |
Lutz; Bernd (Kempten,
DE), Weh; Andreas (Sulzberg, DE), Mayr;
Matthias (Rettenberg, DE), Tandler; Juergen
(Fuessen, DE) |
Applicant: |
Name |
City |
State |
Country |
Type |
Robert Bosch GmbH |
Stuttgart |
N/A |
DE |
|
|
Assignee: |
ROBERT BOSCH GMBH (Stuttgart,
DE)
|
Family
ID: |
55637845 |
Appl.
No.: |
14/885,618 |
Filed: |
October 16, 2015 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20160107627 A1 |
Apr 21, 2016 |
|
Foreign Application Priority Data
|
|
|
|
|
Oct 16, 2014 [DE] |
|
|
10 2014 221 015 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02K
5/22 (20130101); H02K 11/21 (20160101); B60T
13/745 (20130101); H02K 11/215 (20160101); G01D
5/20 (20130101); B60T 13/74 (20130101); H02K
7/14 (20130101); B60T 8/368 (20130101) |
Current International
Class: |
B60T
8/36 (20060101); B60T 13/74 (20060101); G01D
5/20 (20060101); H02K 11/21 (20160101) |
Field of
Search: |
;310/68B
;303/20,116.4,119.3,DIG.10 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Irvin; Thomas
Attorney, Agent or Firm: Norton Rose Fulbright US LLP
Messina; Gerard
Claims
What is claimed is:
1. A device for operating a brake system of a motor vehicle,
comprising: an electric motor for driving a pressure generation
unit for generating hydraulic pressure; a housing block of a
hydraulic unit, which is able to be connected to the pressure
generation unit and the brake system of the motor vehicle; a
control unit for controlling the electric motor; and a rotary
position sensor of the electric motor, wherein: the electric motor
is fixed in place on a first side of the housing block of the
hydraulic unit, the control unit is fixed in place on a second side
of the housing block, the second side lying opposite from the first
side, the rotary position sensor is situated in such a way that the
rotary sensor detects at least one of a rotational frequency and an
angular position of a rotor of the electric motor, and the rotary
sensor is connected to the control unit through an opening
developed in the housing block, a body of the rotary sensor
extending through the opening from the first side of the housing
block.
2. The device as recited in claim 1, wherein the opening of the
housing block is a through-hole, the rotary position sensor being
press-fit inside the through-hole at a predefined alignment.
3. The device as recited in claim 1, wherein the opening of the
housing block at least regionally has one of a groove and a
shoulder, and wherein the rotary position sensor at least
regionally has a protrusion, the rotary position sensor in an
installed state being situated in such a way that the protrusion of
the rotary position sensor of the electric motor engages with the
one of the groove and the shoulder for the form-fitting connection
of the rotary position sensor with the opening of the housing
block.
4. The device as recited in claim 1, wherein the rotary position
sensor includes an integrated circuit situated on a circuit board
that is situated one of on and inside a plastic carrier, the
integrated circuit being situated on a first end section of the
plastic carrier, and electrical contacts for contacting the control
unit are connected to the circuit board by a pressed screen and are
developed on a second end section of the plastic carrier.
5. The device as recited in claim 1, wherein the electric motor is
fixed in place on the first side with the aid of a flange, wherein
an opening developed concentrically with the opening in the housing
block is formed in the flange for a feed-through of the rotary
position sensor.
6. The device as recited in claim 1, further comprising an annular
magnet carrier disk situated in a torsionally fixed manner on the
rotor.
7. The device as recited in claim 6, wherein the magnet carrier
disk has a multitude of adjacently situated magnet elements having
an alternating N and S orientation, the rotary position sensor
detecting a change in angles of field lines of the magnet elements
caused by a relative change in position between the rotary position
sensor and individual ones of the magnet elements.
8. The device as recited in claim 1, further comprising an annular
toothed wheel disposed in a torsionally fixed manner on the
rotor.
9. The device as recited in claim 8, wherein the rotary position
sensor includes an inductive sensor that detects a change in an
amplitude of an oscillating circuit of the rotary position sensor
of the electric motor brought about by a relative change in
position between the rotary position sensor and individual toothed
wheels.
10. The device as recited in claim 1, wherein the rotary position
sensor detects an angular position of the rotor by offsetting
against a timing circuit signal at a predefined zero setting of one
of a magnet carrier disk and a toothed disk.
11. The device as recited claim 1, wherein the rotary position
sensor detects a rotary position of the rotor in relation to a
magnetic field of a stator of the electric motor.
12. The device as recited in claim 1, wherein a first end of the
rotary sensor emerges from the second side of the housing block and
extends into an opening of the control unit.
13. The device as recited in claim 1, wherein an axial length of
the body of the sensor is longer than a distance between the first
and second sides of the block as measured along an axis
perpendicular to the first and second sides.
14. The device as recited in claim 1, wherein the control unit is
mounted to an exterior surface of the housing block.
15. A method for operating a brake system of a vehicle, comprising:
supplying an electric motor that drives a pressure generation unit
for generating hydraulic pressure; supplying a housing block of a
hydraulic unit, which is connected to a pressure generation unit
and a brake system of the motor vehicle; supplying a control unit
for controlling the electric motor; and supplying a rotary position
sensor of the electric motor, wherein: the electric motor is fixed
in place on a first side of the housing block of the hydraulic
unit, the control unit is fixed in place on a second side of the
housing block, the second side lying opposite from the first side,
the rotary position sensor is situated in such a way that the
rotary sensor detects at least one of a rotational frequency and an
angular position of a rotor of the electric motor, and the rotary
sensor is connected to the control unit through an opening
developed in the housing block, a body of the rotary sensor
extending through the opening from the first side of the housing
block.
Description
FIELD OF THE INVENTION
The present invention relates to a device for operating a brake
system of a motor vehicle and to a rotary position sensor for an
electric motor for use in a device for operating a brake system of
a motor vehicle.
BACKGROUND INFORMATION
As a rule, units having electric motors for operating a brake
system of a motor vehicle use an electric motor which has an rpm
sensor and is actuated by a control unit of the module. The rpm
sensor is electrically connected to the control unit. The
electrical wiring and cabling from the rpm sensor to the control
unit is normally routed around a housing block of a hydraulic unit
of the module, the electric motor being situated on a first side of
the housing block of the hydraulic unit, and the control unit on a
second side of the housing block of the hydraulic unit.
German Published Patent Application No. 42 38 965 describes an
electric motor equipped with an rpm sensor; via electric lines, the
electric motor and the rpm sensor are connected to a control unit
for a voltage supply of the electric motor and the rpm sensor, and
for recording the sensor signal output by the rpm sensor via a
signal line. The voltage connections of the rpm sensor are
connected to a motor terminal of the electric motor, and the signal
line is connected to a voltage terminal of the operating voltage
source.
SUMMARY
The present invention provides a device for operating a brake
system of a motor vehicle which has an electric motor configured
for driving a pressure generation unit in order to generate
hydraulic pressure; a housing block of a hydraulic unit, which is
able to be connected to the pressure generation unit and the brake
system of the motor vehicle; a control unit for controlling the
electric motor; and a rotary position sensor of the electric motor.
The electric motor is fixed in place at a first location of the
housing block of the hydraulic unit, and the control unit is fixed
in place on a second side, situated across from the first side, of
the housing block of the hydraulic unit, and the rotary position
sensor of the electric motor is situated in such a way that it
detects a rotational frequency and/or an angular position of a
rotor of the electric motor and is connected to the control unit by
way of an opening developed in the housing block of the hydraulic
unit.
The present invention furthermore provides a method for operating a
brake system of a motor vehicle. The method includes supplying an
electric motor, which drives a pressure generation unit for
generating hydraulic pressure. In addition, the method includes
supplying a housing block of a hydraulic unit, which is connected
to the pressure generation unit and the brake system of the motor
vehicle. Moreover, the method includes supplying a control unit for
controlling the electric motor, and supplying a rotary position
sensor of the electric motor, the electric motor being fixed in
place on a first side of the housing block of the hydraulic unit,
and the control unit being fixed in placed on a second side of the
housing block of the hydraulic unit lying across from the first
side. The rotary position sensor of the electric motor detects a
rotational frequency and/or an angular position of a rotor of the
electric motor and is connected to the control unit by way of an
opening developed in the housing block of the hydraulic unit.
In addition, the present invention provides a rotary position
sensor for an electric motor to be used in a device for operating a
brake system of a motor vehicle, which is developed to detect a
rotary frequency and/or an angular position of a rotor of the
electric motor, and to be connected to a control unit by way of an
opening developed in a housing block of a hydraulic unit.
One idea of the present invention is to provide a rotary position
sensor, which taps off a signal directly at the rotor and transmits
the signal via a direct, or the shortest possible link to the
control unit. By inserting the rotary position sensor through the
opening developed in the housing block of the hydraulic unit, it is
no longer necessary to provide plug-in connections on the outside
of the device for operating a brake system of a motor vehicle
equipped with the electric motor, the housing block of the
hydraulic unit, and the control unit for controlling the electric
motor.
According to one preferred further development, the opening of the
housing block of the hydraulic unit is realized by a through-hole,
and the rotary position sensor of the electric motor is press-fit
inside the through-hole with a predefined alignment. Because of the
predefined alignment and the press-fitting of the rotary position
sensor of the electric motor inside the through-hole, it is
possible to align the rotary position sensor of the electric motor
according to individual requirements and to retain it in the
desired position.
According to one other preferred further development, the opening
developed in the housing block of the hydraulic unit at least
regionally includes a groove or shoulder, and the rotary position
sensor of the electric motor at least regionally includes a
protuberance, the rotary position sensor of the electric motor in
the installed state being situated in such a way that the
protuberance of the rotary position sensor of the electric motor
engages with the groove or the shoulder of the opening in the
housing block of the hydraulic unit for the form-fitting connection
of the rotary position sensor of the electric motor with the
opening of the housing block of the hydraulic unit. As a result, a
stable and reliable connection or fit is able to be established
between the rotary position sensor of the electric motor and the
opening developed in the housing block of the hydraulic unit.
Moreover, the rotary position sensor of the electric motor is
retained in the desired correct alignment in a torsionally fixed
manner.
According to another preferred further development, the rotary
position sensor of the electric motor has an integrated circuit
situated on a circuit board, which is disposed on or inside a
plastic carrier, the integrated circuit being situated in a first
end section of the plastic carrier, and electric contacts for
contacting the control unit, which are connected to the circuit
board by a pressed screen, being formed in a second end section of
the plastic carrier. By placing all required components on or
inside the plastic carrier, the rotary position sensor of the
electric motor has a compact shape. This ensures a robust design
and provides for a simple installation of the rotary position
sensor of the electric motor.
According to another preferred further development, the opening of
the housing block of the hydraulic unit is situated in parallel
with an axis of rotation of the electric motor, and the protrusions
of the rotary position sensor of the electric motors are developed
in the form of a star. Placing the opening of the housing block of
the hydraulic unit parallel to the axis of rotation of the electric
motor makes it possible to provide a connection between the
electric motor and the control unit that is preferably as short as
possible. The star-shaped development of the protrusions of the
rotary position sensor ensure a simple and secure fixation of the
rotary position sensor inside the opening of the housing block of
the hydraulic unit once the protrusions engage with the
corresponding counterparts.
According to one additional preferred further development, a flange
fixes the electric motor in place on the first side of the housing
block of the hydraulic unit; an opening for the feed-through of the
rotary position sensor of the electric motor, which is concentric
with respect to the opening developed in the housing block of the
hydraulic unit, is developed in the flange. The opening developed
in the flange advantageously makes it possible to guide the rotary
position sensor through the flange in order to allow it to tap off
a signal at the adjacently located rotor.
According to another preferred further development, an annular
magnet carrier disk is disposed on the rotor of the electric motor
in a manner that prevents it from rotating The magnet carrier disk
thus rotates along when the rotor of the electric motor is rotating
and advantageously allows a detection of a rotational frequency
and/or an angular position of the rotor of the electric motor with
the aid of the rotary position sensor.
According to another preferred further development, the magnet
carrier disk has a multitude of magnet elements which are situated
next to each other and have an alternating N and S orientation, the
rotary position sensor of the electric motor being developed to
detect a change in the angles of the field lines of the individual
magnet elements caused by a relative positional change between the
rotary position sensor of the electric motor and the magnet
elements. As a result, it is possible to detect the rotational
frequency and/or the angular position of the rotor of the electric
motor in a reliable manner.
According to another preferred further development, an annular
toothed disk is disposed on the rotor of the electric motor in a
manner that prevents rotation. Providing the toothed disk
advantageously makes it possible to provide an inductive sensor for
detecting the rotational frequency and/or the angular position of
the rotor of the electric motor.
According to another preferred further development, the rotary
position sensor of the electric motor is developed in the form of
an inductive sensor, which detects a change in an amplitude of the
oscillating circuit of the rotary position sensor of the electric
motor brought about by a relative change in position between the
rotary position sensor of the electric motor and particular toothed
wheels. It is therefore possible to detect the rotational speed
and/or the angular position of the rotor of the electric motor in a
reliable manner.
According to another preferred further development, the rotary
position sensor of the electric motor is configured for detecting
the angular position of the rotor of the electric machine by an
offset against a timing circuit signal at a predefined zero setting
of the magnet carrier disk or the toothed disk. As a result, it is
easy to detect the angular position of the rotor of the electric
motor using the same means as the means for detecting the
rotational frequency of the rotor of the electric motor.
According to another preferred further development, the rotary
position sensor of the electric motor is configured for detecting a
rotary position of the rotor of the electric motor in relation to a
magnetic field of a stator of the electric motor. The rotary
position sensor may thus be used to advantage for different types
of electric motors.
According to another preferred further development, the rotary
position sensor of the electric motor is configured for detecting
the angular position of the rotor of the electric machine by an
offset against a timing circuit signal at a predefined zero setting
of the magnet carrier disk or the toothed disk. As a consequence,
it is easy to detect the angular position of the rotor of the
electric motor using the same means as the means for detecting the
rotational frequency of the rotor of the electric motor.
The described embodiments and further refinements may be combined
with each other as desired.
Additional possible embodiments, further refinements and
implementations of the present invention also include combinations
of features of the present invention that are not explicitly
mentioned above or below with regard to the exemplary
embodiments.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 a sectional view of a device for operating a brake system of
a motor vehicle according to one preferred specific embodiment of
the present invention.
FIG. 2 a schematic view of the device for operating the brake
system of the motor vehicle according to the preferred specific
embodiment of the present invention.
FIG. 3 a schematic representation of a rotary position sensor
according to the preferred specific embodiment of the present
invention.
FIG. 4 an enlarged detail view of the rotary position sensor
according to the preferred specific embodiment of the present
invention.
FIG. 5 a schematic representation of an annular magnet disk carrier
according to the preferred specific embodiment of the present
invention.
FIG. 6 a flow chart of a method for operating a brake system of a
motor vehicle according to the preferred specific embodiment of the
present invention.
DETAILED DESCRIPTION
Unless indicated otherwise, identical reference symbols in the
figures of the drawing indicate identical or functionally
equivalent elements, parts or components.
FIG. 1 shows a sectional view of a device for operating a brake
system of a motor vehicle according to one preferred specific
embodiment of the present invention.
Device 1 for operating the brake system of the motor vehicle has an
electric motor 10, a pressure generation unit 11, a housing block
12 of a hydraulic unit, a control unit 14, and a rotary position
sensor 16 of electric motor 10.
Electric motor 10 is preferably fixed in place on a first side 12a
of housing block 12 of the hydraulic unit. According to the
preferred specific embodiment of the present invention, electric
motor 10 is developed in the form of an electronically commutated
direct-current motor. As an alternative, the electric motor may
also have some other suitable design. Electric motor 10
advantageously drives pressure generation unit 11 for generating
hydraulic pressure. Pressure generation unit 11 in turn is
connected to housing block 12 of the hydraulic unit and generates
hydraulic pressure there when required. Electric motor 10 is
advantageously fixed in place on first side 12a of housing block 12
of the hydraulic unit with the aid of a flange 28. According to the
preferred specific embodiment of the present invention, an annular
magnet carrier disk 30 is disposed on a rotor 17 of electric motor
10 in a torsionally fixed manner. Instead of the magnet carrier
disk, a toothed disk may alternatively be fixed in place on the
rotor in a torsionally fixed manner. The toothed disk is used for a
rotary position sensor that operates according to the induction
principle, whereas a rotary position sensor that operates according
to the Hall effect principle is used if the magnet carrier disk is
provided.
Fixed in place on a second side 12b of housing block 12 of the
hydraulic unit is control unit 14 for controlling electric motor
10. Housing block 12 of the hydraulic unit furthermore has an
uninterrupted opening 18 which is developed in the longitudinal
direction of housing block 12 of the hydraulic unit. Rotary
position sensor 16 of the electric motor is placed in such a way
that it detects a rotational frequency and/or an angular position
of rotor 17 of electric motor 10 and is connected to control unit
14 by way of opening 18 developed in housing block 12 of the
hydraulic unit.
Opening 18 of housing block 12 of the hydraulic unit preferably
takes the form of a through-hole. As an alternative, opening 18 of
housing block 12 of the hydraulic unit may also be introduced by
some other suitable machining method. Rotary position sensor 16 of
electric motor 10 is preferably press-fit inside the through-hole
at a predefined alignment.
Opening 18 formed in housing block 12 of the hydraulic unit
preferably has a shoulder 20 at least regionally, and rotary
position sensor 16 has a protrusion 22 at least regionally. As an
alternative, opening 18 created in housing block 12 of the
hydraulic block at least regionally may also have a groove, and
rotary position sensor 16 of electric motor 10 at least regionally
have protrusion 22.
In the installed state, rotary position sensor 16 of electric motor
10 is preferably situated in such a way that protrusion 22 of
rotary position sensor 16 of electric motor 10 engages with
shoulder 20 of opening 18 in housing block 12 of the hydraulic unit
for the form-fitting connection of rotary position sensor 16 of
electric motor 10 and opening 18 of housing block 12 of the
hydraulic unit. As an alternative, rotary position sensor 16 of
electric motor 10 in the installed state may be situated in such a
way that protrusion 22 of rotary position sensor 16 of electric
motor 10 engages with the groove of the opening in housing block 12
of the hydraulic unit for the form-fitting connection of rotary
position sensor 16 of electric motor 10 and opening 18 of housing
block 12 of the hydraulic unit.
Shoulder 20 of opening 18 in housing block 12 of the hydraulic unit
preferably is positioned on the side of the control unit, since
rotary position sensor 16 is introduced into the opening of housing
block 12 from the side of the control unit. Once rotary position
sensor 16 has been placed in the opening of housing block 12,
rotary position sensor 16 is axially fixated, preferably by
introducing a stamp for folding material of housing block 12.
Electric motor 10 is preferably installed on first side 12a of
housing block 12 of the hydraulic unit with the aid of flange 28,
in which an opening 29, which is concentric with respect to opening
18 formed in housing block 12 of the hydraulic unit, is developed
for the feed-through of rotary position sensor 16 of electric motor
10.
FIG. 2 shows a schematic view of the device for operating the brake
system of a motor vehicle according to the preferred specific
embodiment of the present invention.
The opening of housing block 12 of the hydraulic unit is
advantageously situated in parallel with an axis of rotation of
electric motor 10. As illustrated in FIG. 2, rotary position sensor
16 is placed to the left of the electric motor according to the
preferred specific embodiment, in such a way that it is situated
next to magnet carrier disk 30 developed in the form of a ring on
rotor 17, and thus is able to tap off a signal from magnet carrier
disk 30.
A stator 32 having corresponding windings is provided around rotor
17. In addition, a packet 34 of ferromagnetic material is disposed
on rotor 17, and a multiplicity of adjacently placed magnets is
located above.
According to the preferred specific embodiment, the rotor is
developed in an offset fashion for an interference fit on the
A-bearing.
FIG. 3 shows a schematic representation of a rotary position sensor
in accordance with the preferred embodiment of the present
invention.
Rotary position sensor 16 has a plastic carrier 26, on or inside
which a circuit board (not shown in FIG. 3) fitted with an
integrated circuit is situated. Plastic carrier 26 has a first end
section 26a and a second end section 26b. In the assembled state,
plastic carrier 26 is disposed in such a way that it is situated
adjacently to first end section 26a, next to the rotor (not shown
in FIG. 3) of the electric motor. A plurality of electric contacts
27 are formed at second end section 26b of plastic carrier 26.
Electrical contacts 27 are used for contacting the control unit
(not shown in FIG. 3). Situated in a central region of plastic
carrier 26 is protrusion 22 for fixing plastic carrier 26 in
position in the housing block of the hydraulic unit, which is not
shown in FIG. 3, during the assembly.
FIG. 4 shows an enlarged detail view of the rotary position sensor
in accordance with the preferred embodiment of the present
invention.
On first end section 26a, plastic carrier 26 of rotary position
sensor 16 advantageous includes circuit board 24, on which
integrated circuit 25 or the sensor chip of rotary position sensor
16 is situated. In addition, circuit board 24 is connected to a
pressed screen (not shown in FIG. 4). The pressed screen is
advantageously connected to circuit board 24 using a press-fit
bushing. As an alternative, some other suitable connection may be
provided between circuit board 24 and the pressed screen. The
pressed screen is guided on or inside plastic carrier 26 from first
end section 26a to second end section 26b of plastic carrier 26 and
connects circuit board 24 to electrical contacts 27 for contacting
the control unit.
FIG. 5 shows a schematic representation of an annular magnet
carrier disk in accordance with the preferred embodiment of the
present invention.
Magnet carrier disk 30 has a multitude of adjacently located magnet
elements 31a, 31b having an alternating N and S orientation. The
rotary position sensor (not shown in FIG. 5) of the electric motor
detects a change in the angle of the field lines of the individual
magnet elements that was brought about by a relative positional
change between the rotary position sensor of the electric motor and
magnet elements 31a, 31b.
As an alternative to providing the magnet carrier disk, it is also
possible to place a toothed disk on the rotor of the electric motor
in a torsionally fixed manner. If a toothed disk is provided, the
rotary position sensor of electric motor 10 operates according to
the induction principle. In so doing, the rotary position sensor
detects a change in an amplitude of an oscillating circuit of the
rotary position sensor induced by a relative positional change
between the rotary position sensor and the individual toothed
wheels.
The rotary position sensor of the electric motor is furthermore
configured for detecting the angular position of the rotor of the
electric machine by an offset operation against a timing circuit
signal at a predefined zero setting of magnet carrier disk 20 or,
alternatively, the toothed disk. The rotary position sensor of the
electric motor is configured to detect a rotary position of the
rotor of the electric motor in relation to a magnetic field of a
stator of the electric motor.
FIG. 6 shows a flow chart of a method for operating a brake system
of a motor vehicle according to the preferred specific embodiment
of the present invention.
The method includes supplying S1 an electric motor 10, which drives
a pressure generation unit 11 for generating hydraulic pressure. In
addition, the method includes supplying S2 a housing block 12 of a
hydraulic unit, which is connected to pressure generation unit 11
and the brake system of the motor vehicle. Moreover, the method
includes supplying S3 a control unit 14 for controlling electric
motor 10, and supplying S4 a rotary position sensor 16 of electric
motor 10, electric motor 10 being fixed in place on a first side
12a of housing block 12 of the hydraulic unit, and control unit 14
being fixed in place on a second side 12b, lying across from first
side 12a, of housing block 12 of the hydraulic unit; and rotary
position sensor 16 of electric motor 10 detecting S5 a rotational
frequency and/or an angular position of a rotor 17 of electric
motor 10 and being connected to control unit 14 by way of an
opening 18 developed in housing block 12 of the hydraulic unit.
Although the present invention was described above with reference
to preferred exemplary embodiments, it is not limited to these and
may be modified in numerous ways. In particular, the invention can
be changed or modified in many ways without deviating from the core
of the present invention.
For example, the rotary position sensor may also be produced from
some other suitable material. Shoulder 20 developed in the
through-hole of the housing block of the hydraulic unit or,
alternatively, the groove may be implemented by a stepped bore.
* * * * *